Electricity: power supply or regulation systems – Self-regulating – Using a three or more terminal semiconductive device as the...
Reexamination Certificate
2007-06-06
2009-10-27
Berhane, Adolf (Department: 2838)
Electricity: power supply or regulation systems
Self-regulating
Using a three or more terminal semiconductive device as the...
Reexamination Certificate
active
07609044
ABSTRACT:
A current generator is provided, including a bandgap circuit, an operational amplifier, and an output resistor. The bandgap circuit is used to output a bandgap reference voltage insensitive to environment temperature and supply voltages. The operational amplifier has a positive input receiving the bandgap reference voltage, a negative input, and an output connected to the negative input to obtain an output voltage substantially equal to the bandgap reference voltage. The output resistor is connected to the output of the operational amplifier serially to generate an output current flowing through the output resistor. Thus, the output current generated by the current generator is insensitive to environment temperature and supply voltages, and therefore more accurate and stable.
REFERENCES:
patent: 7463868 (2008-12-01), Rofougaran et al.
patent: 2005/0242799 (2005-11-01), Erdelyi et al.
Berhane Adolf
Himax Technologies Limited
Mehari Yemane
Rabin & Berdo P.C.
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